We can write 16 as the product of 3 and 5 with a remainder of 1: $$16 = 3 \times 5 + 1$$

Therefore, we can write 16 divided by 3 as a mixed number as:

$$\frac{16}{3} = 5\frac{1}{3}$$

or as an improper fraction in simplest form as:

$$\frac{16}{3} = \frac{15}{3} + \frac{1}{3} = 5\frac{1}{3} = \frac{5\times3}{1\times3}+\frac{1}{3}=\frac{16}{3}$$

To divide a fraction by a whole number, we can simply multiply the fraction by the reciprocal of the whole number. The reciprocal of 2 is 1/2, so we can rewrite the expression as:

\[\frac{3}{4} \div 2 = \frac{3}{4} \times \frac{1}{2}\]

Now, we can multiply the numerators and denominators:

\[\frac{3}{4} \times \frac{1}{2} = \frac{3 \times 1}{4 \times 2} = \frac{3}{8}\]

Therefore, 3/4 divided by 2 is equal to 3/8.

The LCM of 7, 14, and 21 is 42.

Explanation:

We can begin by finding the prime factorization of each number:
7 = 7 x 1
14 = 2 x 7 x 1
21 = 3 x 7 x 1

Then, we can take the highest power of each prime factor:
2 (from 14)
3 (from 21)
7 (from all three numbers)

Finally, we multiply these numbers together:

2 x 3 x 7 = 42